Question

Past & Present Continuous Passive

Answer 1

Present Continuous Passive is used to talk about some ongoing actions performed at the moment of speaking or around it.
[subject] + am/is/are + -ing verb.
am/is/are + being + the Past Participle form of the verb.
am/is/are + [subject] + being + Past Participle.

Past Continuous Passive is used to talk about actions that were ongoing at a particular moment in the past. The emphasis is on the process. When Jack arrived to the workshop his car was still being repaired. The students were being taught grammar all day long.

Hope this helps you :)